Discharge valve for ice-machine compressors



- April 24, 1928.

E. R. DE LUIZ ET AL DISCHARGE VALVE FOR ICE MACHINE COMPRESSORS Filed July 11. 1927 INVENTORS BY 3 w M ATTORNEY Patented Apr. "24, 192s.

UNITED STATES; PATENT orri'ca.

EDWARD n. m: LUIZ AND nanny L. MITCHELL, or roar wnxmi, INDIANA, 118-.

' SIGNORS TO WAYNE COMPANY, OF FORT WAYNE, INDIANA,

INDIANA. I

' Application filed July 11,

Our invention relates to discharge valves for the compressors ofice machines and articularly to those for domestic use. valves must operate at high speed. On the best form of our apparatus now known to us this valve now normally opens approximatelythree hundred and ten times a minute. The extent to which the valve opens is very slight. Ordinarily the refrigerant in gaseous form only passes the valve, but occasionally a slug of [through and the valve must be constructed so as to operate efliciently under allconditions without damage to itself. p

Our invention. is adapted to meet such needs. and consists essentially of an ordinarv plain valve seat with a flexible plate valve slidably confined at its ends and when unflexed resting on the valve seat and spaced above said valve a flexiblestopalso slidably confined at its ends. Between the valve plate and stop element is maintained a film of lubricant.

The principal object of our invention is to provide a plate discharge valve held but not clamped at the ends so that said endsare free to s'lidewh'en sa'idwalve" is flexed by pressure upon the middle portion; distributing the strain. Another object of our invention is to provide a plate discharge valve capable of being flexed sufficiently to allow charges of gas to pass the valve, and backed up .by a flexible. stop element capable of being flexed along with the valve to allow slugs of-liquid to pass. 7

We prefer to use no valve cap orpositive stop. y The film of oil between the valve and stop 40 not only lubricates the device but acts as a;

cushion givlng the device adash pot eflect, relieving the Zmoving parts of undue tension that mightotherwise tend to destroy or reduce their resiliency.

In the particular embodiment of our invention selected for illustration v Figure 1, is the top part of an electrically driven ice machine compressor cylinder and head, in vertical axial section,

Fig. 2, is atopplan view ofthe same as though .s'ho'wn'there. in full but with the cylinder head removed, Fig. 3, is a detail of the plate valve,

uch

liquid refrigerant passes A coarona'rron or DISCHARGE VALVE FOR ICE-MACHINE COHPBESSOBS.

192 Serial no. 204,780.

A the cylinder'head; A and A being-secured in position on the top end of the cylinder A by cap screws 8. through the plate A and contiguous thereto is the valve seat a.

. The valve B is a resilient plate with a hole I) at each end, and theseholes are made large.

enough to allow lengthwise movement of the valve when flexed. .On topofthe plate valve B, at each end is placed a spacer C witha' hole 0 similar to the holes b, and locking lugs 0, c Ordinarily we prefer to make Fig. 4, is an enlarged detail of one of the i A port a is formed these spacers approximately four-one-thousandths of an inch thick.

A flexible stop member D, is a plate simi- "'l'fi! in all respects to thevalve B,--=except--it is preferably thicker and rests upon the spacers C at each end spacing it above said valve. The locking lugs c, a? are bent around and over the edges of thestop D and secure the spacer C'gto the stop D.

The valve plate APE bored and tapped at a, a to receive the screws s s. A washei- WVis provided for each of the screws 8. Thetubular portion 10 is of such size as to fit loosely in thei'holes of'the plate valve B, the holes a ofthe spacer C and the similar holes of the stop D; and is of such length as when the. screw ,9 is tightened down it will hold the valve, spacer and stop securely in position but so as "to allow the valve B to slide longitudinally at its ends when it is bent upwardlyupon'the passage of gaseous refrigerant from the cylinder A;"

or so as to allow for sliding movement of both valve B. and stop D at. the ends when liquid refrigerant passes from the cylinder A. i 7

Many changes .may 'be made in the design here shown without departin from the s 'irit of our invention, and it 15 our intent on to claim all designs involving a plate valve, with or without a'co-acting flexible stop, held down at the ends but without clamping so that when pressure under the valve at a point between the ends by the fluid seeking to escape flexes the valve, it will be free to slide at its ends.

We claim as our invention and desire to plate'valve whose mid-portion covers the port, superimposed means adapted to progressively conform to the shape of said valve as flexed for limiting the flex of said valve and means for holding said valve down at both ends but without clamping it so as to permit said valve to make sliding adjustment longitudinally at the ends when said valve is flexed. 2. In a relief valve mechanism a resilient plate valve whose mid-portion covers the port, an opening through said valve plate at each end thereof, means co-acting with said valve at said openings for holding said valve down at the ends'but without clamping it so as to permit said valve to make slidable longitudinal adjustment at the ends when said valve is flexed and superimposed means limiting the flex of said valve.

3. A relief valve mechanism comprising a valve plate. a port through said plate, a valve seat adjacent said port, a resilient plate valve adapted to rest on and close said port and superimposed means limiting the flex of said resilient plate valve, an opening through said valve at each end thereof, and means co-operatingwith. said valve at said openings for snugly but slidably holding said valve in position. v

4. In a relief valve mechanism a' resilient plate valve -whose mid-portion covers the port, a resilient stop plate above the valve, means at each end for spacing said stop from the valve and common means for holding both valve and sto snugly in place at the ends without clampmg them, so as to permit them to make sliding adjustment longitudinally at the ends when flexed.

' 5. A relief valve mechanism comprising a valve plate, a port through said plate, a valve seat adjacent said port, a resilient plate valve adapted to rest on and close said port, an opening through said valve at each end thereof, a resilient platestop, an opening through said stop at each end thereof,

the openings throu h said valve and through said stop adapte to reglster, means for spacing the stop from the valve and means extending through said openings for snugly but slidably holding said valve and stop in position.

6. A relief valve mechanism comprising a valve plate, a port through said plate, a valve seat adjacent said port, a resilient plate valve adapted to rest on and close said port, a hole through each end of said valve, a resilient plate stop, a hole through each end of saidistop, said valve holes and stop holes registering, means for spacing the stop from the valve, and means extending through said holes for snugly but slidably holding said valve and stop in position. a

7. A relief valve mechanism comprising a valve plate, a port through said plate, a,

valve seat adjacent said port, a resilient plate valve adapted to rest on and close said port, a hole through each end of said valve, a resilient plate stop, a hole through. each end of said stop, said valve holes and stop holes registering, means for spacing the stop from the valve, a hole through saidspacing means adapted to register with a hole in the valve and stop, and means extending through said holes for snugly but slidably holding said valve, spacer and stop in position.

8. A relief valve mechanism comprisinga valve plate, a .port through saidplate, a valve seat adjacent said port, a resilient plate valve adapted to rest on and close said port, an opening through said valve at each endthereof, a resilient plate stop, an opening through said stop at each end thereof, the openings through said valve and stop adaptedto register, means for spacing the stop from the valve at each end thereof, a washer for each end of the valve and stop, said washer having a substantially axial prolongation adapted to fit loosely into the openings of the valve and stop, a screw to hold said washer to said valve plate, said prolongation on said washer of such length as when said screw is screwed down to hold said valve and stop snugly but longitudinally slidably in position.

In testimony whereof we have hereunto set our hands.

EDWARD R. ,ma LUIZ. HARRY L. MITCHELL. 

